SU1388591A1 - Multistage telescopic hydraulic cylinder - Google Patents

Abstract

The invention makes it possible to reduce. mass, size and simplified cylinder technology. The mechanical lock is provided with a spring 12 connected to the locking element 8, made in the form of a sleeve and mounted for axial movement along the crush surface 10 of the cylinder 3. Under the action of the spring, the locking element moves and locks the balls 7 of the mechanical lock in the thrust element 9 of the rod 6, prep its engagement under load, load B cylinder. 6 Il.

Description

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The invention relates to general engineering and can be used in multi-stage telescopic hydraulic cylinders used in various lifting installations.

The purpose of the invention is to reduce the weight and size and simplify the manufacture of cylinders.

FIG. 1 shows a multistep telescopic cylinder, a folded state; in fig. 2 to 4 show the successive stages of extending the steps of the hydraulic cylinder; in FIG. 5,6 - the same, folding the hydraulic cylinder.

The multi-stage telescopic hydraulic cylinder comprises a housing 1 in which the pistons of two hollow cylinders 3 with through radial bores 4 and a piston 5 with a rod 6 of the last stage are placed, and a mechanical lock of each stage including balls 7 located in the radiator; an element 8 mounted on the side opposite to the piston 2, and the thrust elements 9 on the outer and inner surfaces 10 and 11 of the cylinders 3 and, respectively, of the rod 6 and the body 1, and the mechanical lock is provided with a spring 12 connected to the locking element 8, made in the form of a sleeve and mounted with the possibility of axial movement along the outer surface 10 of the cylinder 3.

In addition, the hydraulic cylinder contains a channel 13 for supplying a working fluid and a channel 14 for supplying a working fluid to the cavity 15.

Multistage telescopic cylinder works as follows.

Fluid through the channel 13 is fed under the pistons 2 and the piston 5, since the rod 6 is free, it begins to move. At the end of the stroke (Fig. 2), the thrust element 9 of the rod 6 coincides with the balls 7 of the mechanical lock and releases the thrust element 9 on the inner surface 11 of the cylinder 3 In this case, the cylinder 3 of one stage is disconnected from the cylinder 3 of the adjacent stage and begins to move out.

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8this time, the locking element 8 is moved by the action of the spring 12

in the axial direction and locks the balls 7 in the stop element 9 of the rod 6, preventing it from being pulled under the action of the load into the cylinder 3. At the end of the stroke of the cylinder 3, the balls 7 (FIG. 3) also coincide with the stop element

9 on the outer surface 10 of cylinder 3 and the next cylinder 3 is released. In this case, the locking element

8 of the mechanical lock closes the adjacent cylinder 3, thus preventing the engagement of the cylinders 3.

During the return stroke (folding) of the hydraulic cylinder (Fig. 5.6), the working fluid is supplied to the cavity 15 through the channel 14, while the cylinder 3 is drawn into the housing 1, the locking element 8 moves and releases the first seven. dke. The folding of the hydraulic cylinder can also occur under the action of an external load, while the sequence of folding of the cylinders 3 is not disturbed.

Formula and. zobot-eni

A multi-stage telescopic hydraulic cylinder comprising a housing in which the pistons of hollow cylinders with through radial holes and the piston with the last stage are placed, and a mechanical lock of each stage including charles located in the radial holes, a locking element mounted on the side opposite to the piston, and thrust elements on the outer and inner surfaces of the cylinders and, accordingly, the rod and body, characterized in that, in order to reduce the weight and size and simplify the manufacturing technology cylinder, the mechanical lock is equipped with a spring connected to the locking element, made in the form of tulk and installed with the possibility of axial movement along the outer surface of the cylinder.

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Claims (1)

Claim A multistage telescopic hydraulic cylinder comprising a housing in which pistons of hollow cylinders with through radial holes and a piston with a rod of the last stage are placed, and a mechanical lock of each stage, including balls located in the radial holes, a locking element mounted on the side opposite the piston, and thrust elements on the outer and inner surfaces of the cylinders and, accordingly, the rod and body, characterized in that, in order to reduce weight and dimensions and simplify the technology made Lenia cylinder lock mechanism provided with a spring connected to the locking element in the form dtulki and mounted for axial movement along the outer surface of the cylinder. Fi g. 2 Fig.Z Fi g. 4 Phi *. 5 FIG. 6